Purchased At REI, this roof box is simply amazing. Ease of use scores a 10/10 due to the dual-side opening ability. Convenience was taken into serious consideration when they designed this product. I read many reviews before purchasing and some claimed that it had no impact on fuel economy, which I thought was impossible, but in fact over 2,000 miles of testing and I’d have to agree. Simply amazing – highly-recommended if you need some extra space! Great job on the quality, Thule.